Apparatus for restoring worn-out reamers.



PYziTER'TEB JUNE 25, 1907.

R. SBFETTBR. APPARATUS FOR RESTORING WORN-OUT Rmmas APPLICATION PiLED JAN. 23,1907.

f 2 Br In the practice of my invention,

I use in upsetting an rmrrnn STATES PATENT orrron.

. i, RALPH-SNOWDEN FETTER, OF TRENTON, NEW JERSEY.

Specification of Letters Patent.

Patented. June 25, 1907.

Ap lication fil d January 23,1907. Serial No. 35am.

To all whom it may concern:

Be it known that I, RALPH SNOWDEN FET- TER, a citizen of the United States, and r'e; siding at Trenton, in the county of Mercer and State of New Jersey, have invented certaininew and useful Improvements in Apparatu's'f'or'Restoring Worn-0ut Reamers, of which the following is a specification, such as will enable those skilled the art to which it appertains to make and use the same.-

This invention relates to worn outreamers and particularly to means for restoring the same to their original dimensions and usefulness.

The invention involves the use of a hydraulic press and. of a dieof novel form and said invention is fully disclosed in the following specification, of which the accompanying drawing forms a part, in which the separate parts of my improvementare designated by suitable reference characters in eachof the views, and in which Figure 1 is a side elevation of a hydraulic press which I employ; Fig. 2 a longitudinal section of my improved die for use in upsetting worn out reamers, said section being on the line 22 of Fig. 3, and showing a reamer in osition in said die; Fig. 3 an end view loolling in the direction of the arrow :1: of Fig. 2; and, Fig. 4 a side view of the reamer shown in Fig. 2 but on a reduced scale.

My invention is (particularly adapted "for restoring tapered reamers a, and in practice a hydraulic press I) having a verticallylmovable plunger 1) and a horizontally movable plunger 12 and of any preferred form or construction is em loyed.

provide a die 0 shown in Figs. 1 and 2, which comprises a bottom member 0 and a to p member 0 the left hand end of the bottom member c being provided with an upright portion or shoulder 0 against which the top member a abuts, In the adjacent faces of the die members c and c and at the left hand end of said die is an oblong chamber 0 and at the right hand end of said die and formed in the adj acent faces of the separate die members 0 and c is an oblong chamber 0", and the chambers c and 0 are connected by a central longitudinal passage or chamber 0 which is circular or cylindrical in cross section and of a diameter equal to or slightly greater than the greatest diameter of a reamer of the class referred to before it-is worn 'or used. The chambers c and c may be of any desired sleeve d is reamer, an

'0 is then placed in transverse dimensions but the comparative lengths thereof and the comparative length of the chamber or passage 0 are shown in the drawing. The reamer a is provided with the usual shank'a. and the length of said reamer and its shank is greater than that of the length of the die as clearly shown in Fig. 2. I also provide an adjusting collar or sleeve (1 adapted to fit in the member 0 and through which the smaller and fluted end of thereamer passes, together with a shank collar or sleeve e adapted to fit in the chamber 0 and to project therefrom and through which the shank a of the reamer passes.

In practice, the worn part ofthe reamer between the points f and f is first heated t6 the required degree, after which the collar or laced on the fluted end of the X the collar or sleeve e on the shank of the reamer, and said reamer is then placed in the bottom portion'of the die, af ter which the top portion of the die is placed in position as shown in Figs. 2 and 3. The die position on the bed of the press b and beneat the vertical plunger 6 and pressure is applied to the said vertical plunger so as to firmly hold the die in place.

ressure, is then a plied to the horizontal plunger 6 which is orced forwardly into contact with the end a of the shank a. of the reamer a and into contact with the-end of the collar or sleeve e which proj'ectsfrom the die and that nart of the reamer between the 0 points f and 2 is upset and shortened so that it fills the assage or chamber 0 The collar or sleeve 1 is intended to prevent the twisting or breaking of the fluted and reduced end of the reamer in the above described 5 operation and hold it in proper shape or positron, and after said operation the die is taken out of the ress and the reamer taken out of the die an said reamer is redressed and re tempered or refinished.

My invention is not limited to any kind or class of press, any press which will operate in the manner described being-sufficient.

In the herein described operation the reamer is shortened to a certain extent mm 10 5 ally about. five-eighths of an inch oraccording to the amount to which it had previousl been worn below its normal size.

It will be observed that the part c of the die serves to hold the reamer against longino tudinal movement when pressure is applied to the opposite end thereof in the above de:

scribed operation, but any other suitable means may be provided for accomplishing ed by a central longitudinal passage in which in practice, the reamemto be upset is placed, that part of said die in which said chambers and passage are formed beingshorter than the reamer to be upset, a collar or sleeve adapted to be mounted on the fluted endofthe reamer and to lit in one of the said .ehambc'rs, and another collar or sleeve adapted to-be mounted on the shank of the reamer and to fit in the other endchamber of the die and to project from saiddiel 2. A die for use in upsetting Worn reamers comprising two separate parts, said parts being provided in their adjacent faces and their opposite ends'with cut-away portions forming longitudinal end chambers connected by a central longitudinal passage in which in practice, the reamer to be upset is placed, that part of said die inwhich said chambers and passage are formed being shorter than the reamer to be upset, a collar 1 or sleeve adapted to be mounted on the fluted end of the reamer and to fit in one of the said chambers, and another collar or sleeve adapted to be mounted on the shank of the reamer and to fit in the other end chamber of the die and to project from said die, said die being provided with means to prevent the longitudinal movement of the reamer when pressure RALPH SNOWDEN Witnesses:

HENRY K. MIToHELL, SAMUEL RAE.

FETTER 

